unaccustomed

/ˌʌnəˈkʌstəmd/
adjective
  1. Not familiar with something; not used to something.
    • The puppy was unaccustomed to being left alone and whined all day.
    • She was unaccustomed to the cold weather after living in the tropics.
    • He felt unaccustomed to the formal dress code at the new office.
  2. Not typical or usual for someone; unusual or surprising.
    • After years of frugality, her unaccustomed spending spree worried her family.
    • His unaccustomed silence made everyone in the room nervous.
    • The teacher showed an unaccustomed kindness that surprised the students.
What does "unaccustomed" mean? | whatsthatwordmean | whatsthatwordmean